I'm going to call this sendmail-related since I'm trying to figure out
why we get loooooong pauses after sending the end-of-message dot to
hotmail. It looks like it's not us, they're doing something crazy.

I notice in passing that hotmail's port 25 greeting is:

220 bay0-mc4-f3.bay0.hotmail.com Sending unsolicited commercial or bulk
e-mail to Microsoft's computer network is prohibited. Other
restrictions are found at http://privacy.msn.com/Anti-spam/. Violations
will result in use of equipment located in California and other states.

What on earth does the last sentence mean?

Joseph Brennan